[12] A. and C. Ionescu Tulcea, On the existence of a lifting commuting with the left translations of an arbitrary locally compact group, In Proceddings of the Fifth Berkeley Symposium, Vol. II, Part 1, University of California Press, Berkeley 1967, pp. 63-97.

[13] A. and C. Ionescu Tulcea, Topics in the theory of lifting, Springer-Verlag, New York 1969.